Drain cup and support therefor



y 1959 A. A. BAKER ETAL 2,838,138

DRAIN cup AND SUPPORT THEREFOR Filed Dec. 16, 1954 1 1 54 /Z7 E I /4/ I53 lld lfa lg] 0405/ '6 H5 INVENTORS W 4% BY X. k dh-I CM KM United States Patent s V v v I 2,888,138- DR IN"CUP AND SUPPORT THEREFOR Albert A. Baker and Harry L. Rhoades, Jr., Erie, Pa.,

assignors to Zurn Industries, Inc., Erie, Pa., a corporation of. Pennsylvania Application December 16, 1954, Serial No. 475,803

" s Claims. (Cl. 210-166) This invention relates to roof sump adapters.

In previousroof drains wherein it was desired to install a drain in a new roof, it was necessary to provide a hole in the roof.- Further,- with' drains made according to prior designs, it was necessary to install the leader pipes to the drain cup before the roofing job was completed in order to'hold" the drain-cup in place while the roofing was being installedr" In this disclosure, a means is provided of installing thed-rain in the roof with the top flange of the drain cup flush with the roof. Also, a means is provided for supporting the body of the drain on the roof before the leader pipes have been installed. The body is locked in place by means of a clamp attached to the drain cup and engaging the roof. This permits the roofer to install the body of the drain and complete the roofing job at a later date. When the leader pipes have been installed, the hole is cut in the roofing material, the clamping collar is then installed, and the dome set in place.

More specifically, an object of this invention is to provide a roof drain which is simple in construction, economical to manufacture, and simple and efficient to use.

Another object of the invention is to provide a means for supporting the body of a roof drain independently of any leader pipes thereto prior to installation of piping.

With the above and other objects in view, the present invention consists of the combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawing and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportions, and minor details of construction without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing:

Fig. 1 is a side view partly in cross section of the drain cup and adapter;

Fig. 2 shows a clamping ring and dome strainer removed from the drain cup and the clamping ring attached to the roof; and

Fig. 3 is a view similar to Fig. 2 but showing another embodiment of the drain cup disposed below the clamping ring.

Now with more specific reference to the drawing, Figs. 1 and 2 show a drain cup 101 having a threaded flanged outlet 102 threaded at 103 and having the upper end 104 of a leader pipe threadably engaged therewith. An upper clamping ring 121 having a gravel guard 122 is supported on the separable flange 107 which has the upwardly and outwardly inclined flanged portion 108 thereon. An under deck clamp 114 is supported through lugs 109 by means of threaded bolts 111 which engage threaded holes 110 in the shoulder 150 of the outwardly inclined flanged portion 108. The threaded bolts 111 extend through the holes 113 in the under deck clamp 114 and have nuts 151 which engage the lower end of the under deck clamp 114 and force the under deck clamp 114 toward the flange 108. Nuts 115 are adapted to be put on the bolts 111 and to engage the lugs 109 to hold the flanged member 108 into contact with chamfer 131. A gasket 153 is disposed ina groove 154 in the upper edge 150a of the drain cup 101. A downwardly depending rim 156 is held' in engagement with the gasket 153 by nuts 151. A dome strainer 126 has a bayonet joint which locksit to the upper clamping ring 121 'at 127. Bolts 119 engage the threaded apertures 118 in'legs 117 to lock the upper clamping ring 121 to the separable flange 107. Shoulders 160 on ring 121 interfit with shoulders 161 on separable flange 107 to lock flashing 146 therebetween.

To install the roof drain, the upper clamping ring 121' is disposed in the opening 140 in the roof 141'. The opening 140 is formed with the beveled seat or chamfer 131 to receive the upwardly and outwardly projecting flange 108 on the clamping ring 121. The lower deck clamp 114 is placed in the position shown and the bolt 111 is disposed throughthe hole 113 in the lower deck clamp 114. The bolt 111 is then inserted in the threaded hole and tightened thereon to hold the upper clamping ring 121 in tight engagement with the roof 141. The flashing 146 may then be put in place in a continuous sheet over the separable flange 107 and the clamping ring 121 is attached by means of the bolts 119. The strainer 126 may then be put in place and the gasket 153 may be located and the drain cup 101 may have the rim 156 drawn down against the gasket 153 and the nuts put on the bolts 111 and tightened thereon. The leader pipe may then be put in place at any later time at the convenience of the installation personnel.

It will be noted that Fig. 3 shows another embodiment of the invention similar to the one shown in Fig. 1 Wherein the upper edge 355 and the rim 350 engage the packing 318 in the peripheral groove 353 to form a seal therewith. This embodiment of the invention makes it possible to put the upper and lower clamping rings in place and lay the roof and flashing any time prior to the installation of the drain cup 301 and the leader pipe without any reduction of the convenience in later installing these elements.

The foregoing specification sets forth the invention in its preferred practical forms .but the structure shown is capable of modification within a range of equivalents without departing from the invention which is to be understood is broadly novel as is commensurate with the appended claims.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A roof drain comprising an upper'deck clamp having a flange thereon adapted to rest on the peripheral edge of an opening in a roof, an under deck clamp adapted to engage the roof adjacent the peripheral edges of said opening, and means to attach said upper deck clamp to said under deck clamp, said upper deck clamp having inwardly extending lugs thereon adapted to support a dome strainer, a drain cup, said means for attaching said under deck clamp to said upper deck clamp engaging means on said drain cup urging said drain cup into sealing engagement with said upper deck clamp, sealing means between said upper deck clamp and said drain cup, said sealing means comprising a depending rim on said upper deck clamp engaging packing material supported in a peripheral groove on said drain cup.

2. The roof drain recited in claim 1 wherein said dome strainer is supported on said upper deck clamp by means of a ring like separable flange supported on said upper deck clamp and having a bayonet connection cooperating with a complementary connection on said strainer.

3. In combination, a drain cup and means to support said drain cup in a roof comprising an upper clamping ring adapted to be supported on the upper edge of a roof, means to attach a roofing material to said upper clamping ring, a plate like lower deck clamp having a drain cup receiving opening in the center thereof, spaced apertures in said lower deck clamp, bolts received in said apertures, said bolts extending upwardly and engaging threaded apertures in said clamping ring, said drain cup being re ceived in said lower deck clamp opening, said drain cup having outwardly extending means adapted to be attached to said bolts.

4. The combination recited in claim 3 wherein said upper clamping ring has an upwardly and outwardly sloping surface on the upper edge thereof and a flat ring shaped separable flange member rests on said clamping ring surface clamping flashing material therebetween.

5. The combination recited in claim 4 wherein said clamping ring has an upwardly offset portion thereon and a mating ofiset shoulder on said separable flange adapted to seat thereon to clamp a flashing therebetween.

6. The combination recited in claim 4 wherein said upper clamping ring has inwardly extending lugs thereon receiving locking means to hold said separable flange in place.

7. In combination, a drain cup and an upper deck plate, said upper deck plate having a vertical peripheral portion adapted to interfit with an aperture in a platform, a flange portion extending upwardly and outwardly from said vertical portion, said flange adapted to rest in a chamfer formed in said platform around the outer edge of said aperture, said upper deck plate having a lip on the lower edge thereof, a cup shaped drain cup having an outlet 4 and an upwardly disposed peripheral edge having a flat surface thereon, said lip adapted to engage packing supported on said flat surface, means separably attaching said drain cup to said upper deck plate, a plate like lower deck clamp, an opening through said lower deck clamp receiving said drain cup, and means outside said drain cup to lock said lower deck clamp to said upper deck clamp whereby said upper deck clamp may be locked to said platform prior to the attachment of said drain cup thereto.

8. The combination recited in claim 7 wherein said upper deck clamp has an inwardly facing opening therethrough and a clamping ring adapted to be disposed above said upper deck clamp and having an outwardly facing shoulder complementary with said shoulder on said clamping ring whereby roofing material can be clamped there between, and means on said clamping ring for clamping a drain cup thereto.

References (Zited in the file of this patent UNITED STATES PATENTS 1,253,406 McNeil Jan. 15, 1918 1,828,601 Frye Oct. 20, 1931 1,918,509 Wilcox July 18, 1933 1,991,772 Rieger et a1 Feb. 19, 1935 2,740,490 Matheis Apr. 3, 1956 2,765,865 Schmid Oct. 9, 1956 

